Cape Lyot heliograph results.
Ellison, M. A.(Mervyn Archdall),1909-
McKenna-Lawlor, Susan M. P.
Reid, J. H.
Dublin : Observatory of the School of Cosmic Physics, Dublin Institute for Advanced Studies,
[1960?]
Bibliography: p. 35-36.
Solar flares.
Sudden ionospheric disturbances.